Question

Explain the polymer trapping model for symplastic loading of phloem.

31 Jan 2026
Answer :
Word Count : 240
The polymer trapping model is a mechanism explaining symplastic phloem loading in certain plants, particularly those with minor veins adapted for efficient sugar transport. In this model, sucrose synthesized in mesophyll cells diffuses into specialized companion cells called intermediary cells through plasmodesmata, which are cytoplasmic channels connecting cells. ________ _______ _________ _________ _______ ____ ___.
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